Ok I am sorry but I solved it as I explained at the end of the email, doing it by hand line by line with the help of pango_layout_get_line, pango_cairo_show_layout_line and PangoLayout->length; it wasn't that dificult after all as it seemed at first. Sorry for wasting your time :-(. Goodbye.
El 28/07/06 22:09, Ivan Baldo escribió: > Hello. > I have various lines that start at diferent positions and have > diferent lengths (widths) and I want to put some user text (paragraph) > on them with wordwrapping and some alignment; I am using Cairo to draw > on a GtkDrawingArea and I got the lines and other things drawed > correctly but the text part is dificult. > ASCII art may come handy :-), here is a paragraph: > > _____________ > ______ > ________ > > > I want the users to be able to specify: > - the text of the paragraph. > - the font. > - the type of alignment: left, right, center, justify (by the > doc. it seems Pango doesn't implement justify yet is that true?). > - maybe other properties in the future. > > I am a bit lost after reading the Pango and Cairo documentations, > maybe someone can point me in the right direction for doing this or has > some clues. > With pango it seems that I can specify only a single width and it > does the work to do the wordwrapping, alignment, etc. but in my > paragraphs the widths are diferent on every line. It seems that Pango > also has support for indentation but I don't see that it can be > specified for diferent lines... though maybe I could do it with > attributes and pango_attr_shape_new() but I don't see how: I would > need to specify spaces at the beginning and the end of the line to > obtain the real width of the line but with the attributes I can put > them between two characters and are not for specifing properties of > the visual layout. > What it would be somewhat ideal for me is to just specify a diferent > width for every line and have Pango layout the text for me (doing the > wordwrapping) then I could just iterate over the Pango lines and draw > them in the required positions. > In an ideal world though, Pango would layout the text over the lines > I specify to him with xstart, ystart, xend, yend positions ;-) or maybe > just follow a group of Cairo paths! ;-) > Maybe the only solution is to set the width for the first line and get > the first line that Pango was able to put into it and write it (draw > it), then get the remaining text and repeat for the second line, etc. > after all lines have been written or no more text is available. > Is there something easier than that? > Thanks for your help. > > -- Ivan Baldo - [EMAIL PROTECTED] - http://ibaldo.codigolibre.net/ ICQ 10215364 - Phone/FAX (598) (2) 613 3223. Caldas 1781, Malvin, Montevideo, Uruguay, South America, planet Earth. In favour of world peace and freedom, against U.S.A. and allies!!! Alternatives: [EMAIL PROTECTED] - http://go.to/ibaldo _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
